Watson geay



(No Model.)

W. GRAY.

PAPER STOCK DRAINER.

No. 325,206. Patented Aug. 25, 1885.

WITNESSES fiww.

INVEN'IOR fiwww? N. PETERS. Phulu-Lhhographnt, Wuhingtm EC- WATSON GRAY, OF THREE RIVERS, MICHIGAN, ASSIGNOR OF ONEIIALF TO RICHARD II. WEBB,

OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 325,206, dated August 25, 1885.

Application filed September 13, 1883. Renewed September-12, 1884. (No model.)

To aZZ whom it may concern:

Be it known that I, WA'rsoN GRAY, of Three Rivers, in the county of St. Joseph, and State of Michigan, have invented a new and useful Improvement in Paper-Stock Drainers,

which improvement is fully set forth in the following specification and accompanying drawings, in which- Figure 1 is a plan view of my improved to paper-stock drainer. Fig. 2 is a transverse sectional view at :r. Fig. 3 is a transverse sectional view at 9 The object of the present invention is to provide a durable and economical drainer for 1 paper and pulp. The drainers in general use are made of wood slats provided with a covering of sacking, or, as in other cases, made of perforated sheet metal, with the result that they do not drain as freely or economically as desired. The sacking soon becomes rotten and eaten with chemicals, causing holes for stock to waste, and in the case of the perforated sheet metal soon becomes worthless by corrosion. It is designed to remedy these defects by arranging a drainer with two sets of slats, and midway between them placing a layer of gravel or other suitable material through which the water can pass freely without choking up or becoming otherwise 0 disairanged.

In the drawings, A is a frame of any suitable size and of any desired material, wood preferably. Across one side of this frame a series of parallel slats, B, are placed and se- 5 cured. These slats have the corners of the upper side chamfered, as shown at O in Fig. 2, and placed a short distance apart to allow the water to pass freely between, out not far enough to allow thegravel or other material are placed above to pass through. Over these slats a layer of gravel, hammered stone, or other suitable material, I), is placed. Immediately over this layer of gravel a second series of slats, E, is placed. It is designed that these slats have their lower sides, 14,

chamfered so as to be \lshaped, while the upper edges are level. These slats, as in the lower series, are designed to be placed at a sufficient distance apart to allow the water to pass through without permitting the pulp to penetrate, and may be secured in position in any suitable manner.

As will be readily seen, this method of forming drainers is far superior to the usual method, as it is not liable to become choked up, asin the ordinary manner of formingthem, while there is less liability to become disarranged by decay or corrosion.

What I claim as new isl. The use of gravel as a paper and pulp stock drainer, substantially as herein set forth.

2. A paper-stock drainer composed of a suitalfly-slattcd bottom box containing gravel, broken stone, &c., through which the pulp or paper stock is adapted to pass in the process of manufacture, substantially as herein set forth.

3. The box or drainer having a bottom composed of slats placed side by side, said slats having their upper edges chamfered or not, as shown, and a second tier of slats above the bottom slats, placed transversely across the box or bottom, and having their lower edges chamfered or not, substantially as herein set 7 5 forth.

4. In a paper-stock drainer, the combination of the box A, having the bottom composed of slats placed side by side, and having their upper edges chamfered or otherwise, 8c with the transverse slats above chamfered on theirlower edges, and with the gravel between said upper and lower tier of slats, substantially as herein set forth.

In testimony that I claim the foregoing I have hereunto set myhand, this 21st day of August, 1883, in the presence of witnesses.

WATSON GRAY. Witnesses:

ALBERT G. TITUS, T. B. SNYDER. 

